Update to the release version of 0.15, thereby removing the -devel tag
This simplifies things for the port quite a bit since we can now use
MASTER_SITE_GOOGLE_CODE.
Update CONFLICTS to acknowledge removal of rblibtorrent
We need to change the CONFIGURE_ARG to --enable-deprecated-functions
since qbittorrent 2.2.3 uses them.
Remove a no longer needed patch, a better fix was adopted upstream
after my report.

As previously discussed on -ports, make the following changes:
1. Move net-p2p/rblibtorrent-devel to net-p2p/libtorrent-rasterbar-14
a. Update LIB_DEPENDS for ports that depended on rblibtorrent-devel
b. Add entries to MOVED and UPDATING
2. Introduce net-p2p/libtorrent-rasterbar-15, the new devel version
3. Introduce net-p2p/qbittorrent-22, the new devel version of qbittorrent
Feature safe: yes